
How Long Does Flea Treatment Take to Work? Timing Guide
Still seeing fleas an hour after treating? That’s normal. Vet-reviewed guide to how long flea treatments take to work and when it’s safe to reapply.
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FRONTPRO is a chewable tablet that treats flea and tick infestations on your dog. It kills fleas within 8 hours, before they can lay eggs, which helps prevent fleas spreading in your home. Ticks are killed within 48 hours. You can give it with or without food.
iIf your dog is unwell, check with your vet before treating.
This item requires a current prescription from your vet before we can dispatch it. The good news? Sorting it out is simple and only takes a moment.
As soon as your prescription reaches us, our team will verify the details and get your pet’s treatment posted out to you.
FRONTPRO is a chewable tablet that treats flea and tick infestations on your dog. It kills fleas within 8 hours, before they can lay eggs, which helps prevent fleas spreading in your home. Ticks are killed within 48 hours. You can give it with or without food.
iIf your dog is unwell, check with your vet before treating.
FRONTPRO chewable tablets for dogs, from the makers of FRONTLINE, are a non-prescription (NFA-VPS) monthly flea and tick treatment in a beef-flavoured chew. Each tablet contains afoxolaner. One dose kills fleas for 5 weeks and ticks for one month.
FRONTPRO kills fleas within 8 hours, before they can lay eggs, which stops flea eggs building up in your home. Ticks are killed within 48 hours.
FRONTPRO flea and tick tablets are suitable for puppies from 8 weeks old weighing at least 2kg, and for breeding, pregnant and lactating female dogs. Speak to your vet before treating breeding males, or a puppy that is younger or lighter.
Want to know more about timing? Read how long flea treatment takes to work or how to check your dog for fleas.
Weigh your dog before treating.
Too low a dose may not work and can help resistance build up.
Size guide
Give one FRONTPRO tablet matched to your dog’s weight once a month through flea and tick season. It can be given with or without food, and most dogs take it like a treat. Tablets should not be divided.
Dogs over 50kg need a combination of tablets. Follow the label, or ask your vet if you’re unsure.
For full safety information, read the FRONTPRO datasheet (NOAH) or the VMD datasheet for your strength: 11mg, 28mg, 68mg, 136mg.
Choosing the right FRONTPRO flea tablets for dogs
Four strengths, matched to your dog’s bodyweight. Every strength comes in a 1-tablet or 3-tablet pack.
Weigh your dog before choosing a strength.
Dogs over 50kg take a combination of tablets, as the label directs.
Why choose FRONTPRO Chewable Tablets Flea & Tick Treatment for Dogs?
FRONTPRO Active substance:
No prescription needed for this item. A vet, pharmacist or SQP checks every order before it’s supplied.
Legal category: NFA-VPSPick the weight band or pack size you need, then add to basket.
Delivery method, billing, payment. Free standard delivery over £50.
Royal Mail Standard (2–3 working days) or 24 First Class (1 working day). Unbranded, secure packaging.

Still seeing fleas an hour after treating? That’s normal. Vet-reviewed guide to how long flea treatments take to work and when it’s safe to reapply.

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Yes, dogs can get fleas in winter. Many owners have seen infestations during the winter months that were even worse than in summer.